Reinforced-concrete sectional pipe and culvert.



0. c; ALLEN. nsmroacnn 001mm: SEOTIONAL PIPE AND GULVERT.

APPLICATION mum 2111, 12. 4

, Patented ec. 30, 1913] CHARLES C. ALLEN,

ENFORCED CONCRETE CO., NEBRASKA.

OF NEBRASKA CITY, NEBRASKA, ASSIGNOR TO THE 0F NEBRASKA WILSON REE- CITY, NEBRASKA, A CORPORATION OF REINFORCED-CONCRETE SECTIONAL PIPE AND CULVERT.

Application filed September 11, 1912.

Specification of Letters Patent.

PatentedIDec. 3(lta 1 913.

Serial No. 719,845.-

To all whom it may concern: 1

Be it known that I, CHARLES C. ALLEN, a i citizen of the United States, residing at Nebraska City, in the county of Otoe and State of Nebraska, have invented new and useful Improvements in Reinforced-Concrete Sectional Pipes and Culverts, of which the following is a specification.

This invention relates to conduits or culverts of the sectional type and made of reinforced concrete, and the primary object of the same is to provide means for effectively grouting or sealing the joints between the conterminal ends of the sections of a strong and durable character and protected or guarded against blow-outs from inner or outer pressure and also permitting the formation of an-inner flush joint so that the interior portions of the connected pipe sections or culverts maybe free of the least obstruction or roughness. at their points of jointure.

A further object of the invention is to provide reinforcing concrete pipe or culvert sections with inner and outer grouting channels to permit a pipe line to be laid in water and the application of grout to the inner channel from the top in a perfect manner and alsoto provide for a perfect jointof the two, channels and the sections.

With theseand other objects and advantages in view the invention consists in the construction and arrangement of the sev eral parts which will be more fully hereinafter described and claimed. p

In the drawing: Figure 1 is a perspective view of a pipe or'culvert section embodying thefeatures of the invention. Fig. 2 is a sectional elevationv of two pipe or culvert sections with ends-joined and particularly illustrating the advantages of the channels andanchor or -clenclier' grooves. Fig. 3 is an end elevation'pf one of the pipe or culvert sections. t i r The numeral f i'designates a pipe or culvert section or conduit formed of any suitable material, such as concrete. and preferably reinfr-irccd by, longitudinally extending strengthening members or draw-bars 6 embedded therein and having their opposite ends so disposed as to project beyond the ends of each section and overlapped with similar devices of contiguous sections for the nn- )ose'ot' receivin con )lin means of any suitable character. The projecting terminals of the draw-bars, which in the present instance are looped, will be accessible by the structure shown or by any other preferred means. the use of these draw-bars in connecting pipe sections of; reinforced concrete being well known in the art and readily understood, The opposite ends of each section 5 are 7 and 8, the flange 7 having its inner ed e coinciding with the inner surface or periphcry of the pipe section and its outer edge ,coincident with the outer surface of the section. Between the inner edge of the flange 8 and the inner periphery of the pipe section, an inner channel 12 is produced, and between the outer edge of the flange 7 and the outer surface or periphery of the pipe section a channel 13 is provided. The channels 12 and 13 are in communication through downwardly inclined cross-channels 11 which intervene between the flanges 7 and 8.

In the operation of laying the pipe or eulvert sections, a section is placed adjacent to the end of another section already laid and the terminals of the draw bars 6 are connected or locked. The joint is sealed by pouring grout or plastic concrete into the upper contiguous channels 13 and from the latter the grout or concrete flows down-- wardly through the cross-channels 11 into the lower channels 12, the grouting or plastic concrete being applied in such quantity until all of the channels are filledtand the joints sealed, the grouting or concrete being given a finished surface by the use of suitable tools at the upper portions of the joined sections or where the channels 13'are formed and unite. It will be observed that there will be no obstruction to the downward flow of the grouting or of the downward inclination of the crosschannels 11. The grouting when hardened will be readily held inplace-both in the inner and outer channels, and there is no substantial liability of the the grouting by inner or outer. pressure.

The cross-channels 11 also afford means-for. .i closing the inner united" .tllia nr'tell gravitation of the grouting or plastic on?- crete, and through theconstructionspecified 105 the pipe sections inav he laidin water and the inner channels 12 gronted orfilledwith plastic concrete from the top of the united formed with segmental flanges concrete material in view 9 blowing-out of sections in a perfect manner and a positive bond between the two channels and pipe sections is provided.

What is claimed as new is:

1. In a sectional conduit, the combination of abutting sections having the opposite ends formed with segmental flanges of less thickness than the bodies of the sections, the,

one flange having its-inner edge coinciding with the inner surface of each section and the remaining flange having its outer edge coinciding with the outer surface of each section to form outer and inner channels respectively located in the upper and lower portions of the sections, the channels having intermediate communicating means.

2. In a sectional conduit, the combination of abutting sections having'the opposite ends formed with segmental flanges of less thickness than the bodies of the sections, the one flange having its inner edge coinciding with the inner surface of each section and the remaining flange having, its outer edge coinciding with the outer surface of each section to form outer and inner channels respectively located in the upper and lower portions of the sections, downwardly inclined with the inner surface of each section and the remaining flange having its outer edge coinciding with the outer surface of each section to form outer and inner channels re- S])(5tl"6ly located in the upper and lower portions of the sections, cross-channels being formed through the flanges to establish communication between the inner and outer channels, and draw-bars extending through the sections and adapted to have their ends connected.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES C. ALLEN lVitnesses G. M. VARNEL, D. M. ANDERSON. 

